AMA - Academy of Model Aeronautics, the heart and lifeblood of the model aviation community.

Please join the AMA, which is a requirment for joining many R/C clubs. To join, please visit the page at https://www.modelaircraft.org/membership/enroll. You can also verify your membership by visiting https://www.modelaircraft.org/membership/verify

Additional requirments to fly can be found at the Remote ID information page, Remote ID information.

My favorite weather page providing wind speed

▲ Remote ID Info

▲ RC Clubs Finger Lakes Region

▲ R/C Repair - Articles

▲ Aileron Repair

▲ UMX_Turbo_Timber

▲ Sport Cub S2

▲ WACO Telementry Issue

▲ Common Balsa Sizes Chart

Common Balsa Thicknesses
¹⁄₆₄"	0.015625"	0.396875 mm
¹⁄₃₂"	0.03125"	0.79375 mm
³⁄₆₄"	0.046875"	1.190625 mm
¹⁄₂₀"	0.05"	1.27 mm
¹⁄₁₆"	0.0625"	1.5875 mm
³⁄₃₂"	0.09375"	2.38125 mm
¹⁄₈"	0.125"	3.175 mm
³⁄₁₆"	0.1875"	4.7625 mm
¹⁄₄"	0.25"	6.35 mm
³⁄₈"	0.375"	9.525 mm
¹⁄₂"	0.5"	12.7 mm
³⁄₄"	0.75"	19.05 mm
1"	1.0"	25.4 mm

▲ Imperal Metric Chart

I creatred this table to easly see the Imperal to metric relationship.

   mm  =  inch  =  decimal inch       =  decimal mm 
 ----     ----  =  ------------          ----------
       =   1/32 =  0.03125            =   0.79375
  1    =        =  0.0393700787401575 =   1
       =   1/20 =  0.05               =   1.27
  1.5  =        =  0.0590551181102362 =   1.5
       =   1/16 =  0.0625             =   1.5875
  2    =        =  0.078740157480315  =   2
       =   3/32 =  0.09375            =   2.38125
  2.5  =        =  0.0984251968503937 =   2.5
  3    =        =  0.1181102362204724 =   3
       =   1/8  =  0.125              =   3.175
           5/32 =  0.15625            =   3.96875
  4    =        =  0.1574803149606299 =   4
       =   3/16 =  0.1875             =   4.7625
  5    =        =  0.1968503937007874 =   5
       =   7/32 =  0.21875            =   5.55625
  6    =        =  0.2362204724409449 =   6
       =   1/4  =  0.25"              =   6.35
  7    =        =  0.2755905511811024 =   7
       =   9/32 =  0.28125            =   7.14375
       =   5/16 =  0.3125             =   7.9375
  8    =        =  0.3149606299212598 =   8
          11/31 =  0.34375            =   8.73125
  9    =        =  0.3543307086614173 =   9
       =   3/8  =  0.375              =   9.525
 10    =        =  0.3937007874015748 =  10
       =  13/32 =  0.40625            =
 11    =           0.0393700787401575 =  11
       =   7/16	=  0.4375             =  11.1125
       =  15/32 =  0.46875
 12    =        =  0.4724409448818898 =  12
       =   1/2  =  0.5                =  12.7
 13    =        =  0.5118110236220472 =  13
 14    =           0.5511811023622047 =  14
       =   9/16 =  0.5625             =  14.2875
       =   5/8  =  0.625              =  15.875
       =  11/16 =  0.6875             =  17.4625
       =   3/4  =  0.75               =  19.05
       =  13/16 =  0.8125             =  20.6375
       =   7/8  =  0.875              =  22.225
       =  15/16 =  0.9375             =  23.8125
       =    1   =  1.0                =  25.4

Note :
        2.54 cm = 1"			
       25.4  mm = 1"			

Functions :
             decimal inch =  ? mm / 25.4
             decimal mm   =  25.4 / ? inch

▲ Java Apps

▲ O-Rings

While rebuilding a Perry Carburetor on an older HB .40 engine, I needed to identify the size of the O-rings used and created this page. Maybe you will find it useful. After printing, verify the printed box containing the O-ring is 1" square.

AS568 Standard O-Ring Sizes

The below diagrams can be used to match a O-ring to get the AS568 Standard O-Ring Size. The O-ring size is displayed in a 1 inch square box. Verify the box size to ensure the print is properly sized.

ID = Inside Diameter
OD = Outside Diameter
CS = Cross Section

Size :001

ID = 0.029
OD = 0.109
CS = 0.40

Size :002

ID = 0.042
OD = 0.142
CS = 0.50

Size :003

ID = 0.056
OD = 0.176
CS = 0.60

Size :004

ID = 0.070
OD = 0.210
CS = 0.70

Size :005

ID = 0.101
OD = 0.241
CS = 0.70

Size :006

ID = 0.114
OD = 0.254
CS = 0.70

Size :007

ID = 0.145
OD = 0.285
CS = 0.70

Size :008

ID = 0.176
OD = 0.316
CS = 0.70

Size :009

ID = 0.208
OD = 0.348
CS = 0.70

Size :010

ID = 0.239
OD = 0.379
CS = 0.70

Sources :

Complements of : Rotherforth's Web - RC_Hanger - Public

View information above in a seperate tab for printing